test: add React Testing Library (#11771)

superset-frontend/.eslintrc.js

@@ -165,11 +165,11 @@ module.exports = {
         'src/**/*.test.js',
         'src/**/*.test.jsx',
       ],
-      plugins: ['jest', 'no-only-tests'],
+      plugins: ['jest', 'jest-dom', 'no-only-tests'],
       env: {
         'jest/globals': true,
       },
-      extends: ['plugin:jest/recommended'],
+      extends: ['plugin:jest/recommended', 'plugin:testing-library/react'],
       rules: {
         'import/no-extraneous-dependencies': [
           'error',

superset-frontend/jest.config.js

@@ -26,10 +26,7 @@ module.exports = {
     '^spec/(.*)$': '<rootDir>/spec/$1',
   },
   testEnvironment: 'enzyme',
-  setupFilesAfterEnv: [
-    '<rootDir>/node_modules/jest-enzyme/lib/index.js',
-    '<rootDir>/spec/helpers/shim.ts',
-  ],
+  setupFilesAfterEnv: ['<rootDir>/spec/helpers/setup.ts'],
   testURL: 'http://localhost',
   collectCoverageFrom: ['src/**/*.{js,jsx,ts,tsx}'],
   coverageDirectory: '<rootDir>/coverage/',

superset-frontend/package.json

@@ -195,6 +195,8 @@
     "@storybook/preset-typescript": "^3.0.0",
     "@storybook/react": "^6.0.28",
     "@svgr/webpack": "^5.4.0",
+    "@testing-library/jest-dom": "^5.11.6",
+    "@testing-library/react": "^11.2.0",
     "@types/classnames": "^2.2.10",
     "@types/dom-to-image": "^2.6.0",
     "@types/enzyme": "^3.10.5",
@@ -245,21 +247,23 @@
     "eslint-plugin-cypress": "^2.11.1",
     "eslint-plugin-import": "^2.22.0",
     "eslint-plugin-jest": "^23.17.1",
+    "eslint-plugin-jest-dom": "^3.2.4",
     "eslint-plugin-jsx-a11y": "^6.3.1",
     "eslint-plugin-no-only-tests": "^2.0.1",
     "eslint-plugin-prettier": "^3.1.3",
     "eslint-plugin-react": "^7.20.6",
     "eslint-plugin-react-hooks": "^4.1.2",
+    "eslint-plugin-testing-library": "^3.10.1",
     "exports-loader": "^0.7.0",
     "fetch-mock": "^7.7.3",
     "file-loader": "^6.0.0",
     "fork-ts-checker-webpack-plugin": "^0.4.9",
     "ignore-styles": "^5.0.1",
     "imports-loader": "^0.7.1",
-    "jest": "^26.1.0",
+    "jest": "^26.6.3",
     "jest-environment-enzyme": "^7.1.2",
     "jest-enzyme": "^7.1.2",
-    "jsdom": "^16.2.2",
+    "jsdom": "^16.4.0",
     "less": "^3.12.2",
     "less-loader": "^5.0.0",
     "mini-css-extract-plugin": "^0.4.0",

superset-frontend/spec/.eslintrc

@@ -17,15 +17,18 @@
  * under the License.
  */
 {
-  "plugins": ["jest", "no-only-tests"],
+  "plugins": ["jest", "jest-dom", "no-only-tests", "testing-library"],
   "env": {
     "jest/globals": true
   },
-  "extends": ["plugin:jest/recommended"],
+  "extends": [
+    "plugin:jest/recommended",
+    "plugin:testing-library/react"
+  ],
   "rules": {
     "import/no-extraneous-dependencies": ["error", { "devDependencies": true }],
     "jest/consistent-test-it": "error",
     "no-only-tests/no-only-tests": "error",
-    "prefer-promise-reject-errors":  0
+    "prefer-promise-reject-errors": 0
   }
 }

superset-frontend/spec/helpers/setup.ts

@@ -0,0 +1,28 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+// `jest-dom` must be imported before `jest-enzyme` because there are conflicts
+// between these two.
+import '@testing-library/jest-dom/extend-expect';
+import 'jest-enzyme';
+import './shim';
+import { configure as configureTestingLibrary } from '@testing-library/react';
+
+configureTestingLibrary({
+  testIdAttribute: 'data-test-id',
+});

superset-frontend/spec/helpers/testing-library.tsx

@@ -0,0 +1,39 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import React, { ReactNode, ReactElement } from 'react';
+import { render, RenderOptions } from '@testing-library/react';
+import { ThemeProvider, supersetTheme } from '@superset-ui/core';
+
+function SupersetProviders({ children }: { children?: ReactNode }) {
+  return <ThemeProvider theme={supersetTheme}>{children}</ThemeProvider>;
+}
+
+const customRender = (
+  ui: ReactElement,
+  options?: Omit<RenderOptions, 'queries'>,
+) => render(ui, { wrapper: SupersetProviders, ...options });
+
+export function sleep(time: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, time);
+  });
+}
+
+export * from '@testing-library/react';
+export { customRender as render };

superset-frontend/spec/javascripts/components/Timer_spec.tsx

@@ -0,0 +1,85 @@
+/**
+ * @jest-environment jsdom
+ */
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import React from 'react';
+import { render, sleep, waitFor } from 'spec/helpers/testing-library';
+import Timer from 'src/components/Timer';
+import { now } from 'src/modules/dates';
+
+function parseTime(text?: string | null) {
+  return !!text && Number(text.replace(/:/g, ''));
+}
+
+describe('Timer', () => {
+  const mockProps = {
+    startTime: now(),
+    endTime: undefined,
+    isRunning: true,
+    status: 'warning',
+  };
+
+  it('should render correctly', async () => {
+    const screen = render(<Timer {...mockProps} />);
+    const node = screen.getByRole('timer');
+    let text = node.textContent || '';
+    expect(node).toBeInTheDocument();
+    expect(node).toHaveClass('label-warning');
+    expect(node).toHaveTextContent('00:00:00.00');
+    // should start running
+    await waitFor(() => {
+      expect(parseTime(screen.getByRole('timer')?.textContent)).toBeGreaterThan(
+        0.2,
+      );
+    });
+    text = node.textContent || '';
+
+    // should stop
+    screen.rerender(<Timer {...mockProps} isRunning={false} />);
+    // the same node should still be in DOM and the content should not change
+    expect(screen.getByRole('timer')).toBe(node);
+    expect(node).toHaveTextContent(text);
+
+    // the timestamp should not change even after while
+    await sleep(100);
+    expect(screen.getByRole('timer')).toBe(node);
+    expect(node).toHaveTextContent(text);
+
+    // should continue and start from stopped time
+    screen.rerender(<Timer {...mockProps} isRunning />);
+    expect(screen.getByRole('timer')).toBe(node);
+    expect(node).toHaveTextContent(text);
+
+    await waitFor(() => {
+      expect(screen.getByRole('timer')).toBe(node);
+      expect(parseTime(node.textContent)).toBeGreaterThan(0.3);
+    });
+
+    // should restart from start
+    screen.rerender(<Timer {...mockProps} startTime={now()} />);
+    await waitFor(() => {
+      expect(parseTime(node.textContent)).toBeLessThan(0.1);
+    });
+    // should continue to run
+    await waitFor(() => {
+      expect(parseTime(node.textContent)).toBeGreaterThan(0.3);
+    });
+  });
+});

superset-frontend/spec/javascripts/explore/components/ControlRow_spec.tsx

@@ -17,20 +17,20 @@
  * under the License.
  */
 import React from 'react';
-import { shallow } from 'enzyme';
+import { render } from 'spec/helpers/testing-library';
 import ControlSetRow from 'src/explore/components/ControlRow';
 
 describe('ControlSetRow', () => {
   it('renders a single row with one element', () => {
-    // eslint-disable-next-line jsx-a11y/anchor-has-content
-    const wrapper = shallow(<ControlSetRow controls={[<a />]} />);
-    expect(wrapper.find('.row')).toExist();
-    expect(wrapper.find('.row').find('a')).toExist();
+    const { getAllByText } = render(
+      <ControlSetRow controls={[<p>My Control 1</p>]} />,
+    );
+    expect(getAllByText('My Control 1')).toHaveLength(1);
   });
   it('renders a single row with two elements', () => {
-    // eslint-disable-next-line jsx-a11y/anchor-has-content
-    const wrapper = shallow(<ControlSetRow controls={[<a />, <a />]} />);
-    expect(wrapper.find('.row')).toExist();
-    expect(wrapper.find('.row').find('a')).toHaveLength(2);
+    const { getAllByText } = render(
+      <ControlSetRow controls={[<p>My Control 1</p>, <p>My Control 2</p>]} />,
+    );
+    expect(getAllByText(/My Control/)).toHaveLength(2);
   });
 });

superset-frontend/spec/javascripts/sqllab/Timer_spec.jsx

@@ -1,48 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import React from 'react';
-import { styledMount as mount } from 'spec/helpers/theming';
-import Timer from 'src/components/Timer';
-import { now } from 'src/modules/dates';
-
-describe('Timer', () => {
-  let wrapper;
-  const mockedProps = {
-    endTime: null,
-    isRunning: true,
-    status: 'warning',
-  };
-
-  beforeEach(() => {
-    mockedProps.startTime = now() + 1;
-    wrapper = mount(<Timer {...mockedProps} />);
-  });
-
-  it('renders correctly', () => {
-    expect(React.isValidElement(<Timer {...mockedProps} />)).toBe(true);
-    expect(wrapper.find('span').hasClass('label-warning')).toBe(true);
-  });
-
-  it('should start timer and sets clockStr', async () => {
-    expect.assertions(2);
-    expect(wrapper.find('span').text()).toBe('');
-    await new Promise(r => setTimeout(r, 35));
-    expect(wrapper.find('span').text()).not.toBe('');
-  });
-});

superset-frontend/src/components/Label/index.tsx

@@ -33,6 +33,7 @@ export interface LabelProps {
   bsStyle?: string;
   style?: CSSProperties;
   children?: React.ReactNode;
+  role?: string;
 }
 
 const SupersetLabel = styled(BootstrapLabel)`

superset-frontend/src/components/Timer.tsx

@@ -40,8 +40,8 @@ export default function Timer({
   startTime,
   status = 'success',
 }: TimerProps) {
-  const [clockStr, setClockStr] = useState('');
-  const timer = useRef<NodeJS.Timeout>();
+  const [clockStr, setClockStr] = useState('00:00:00.00');
+  const timer = useRef<ReturnType<typeof setInterval>>();
 
   useEffect(() => {
     const stopTimer = () => {
@@ -67,5 +67,9 @@ export default function Timer({
     return stopTimer;
   }, [endTime, isRunning, startTime]);
 
-  return <TimerLabel bsStyle={status}>{clockStr}</TimerLabel>;
+  return (
+    <TimerLabel bsStyle={status} role="timer">
+      {clockStr}
+    </TimerLabel>
+  );
 }

superset-frontend/webpack.proxy-config.js

@@ -130,6 +130,7 @@ function processHTML(proxyResponse, response) {
       body = Buffer.concat([body, data]);
     })
     .on('error', error => {
+      // eslint-disable-next-line no-console
       console.error(error);
       response.end(`Error fetching proxied request: ${error.message}`);
     })